- 27 6月, 2013 1 次提交
-
-
由 Josh Durgin 提交于
Sending the right snapshot context with each write is required for snapshots to work. Due to the ordering of calls, the snapshot context is never set for any requests. This causes writes to the current version of the image to be reflected in all snapshots, which are supposed to be read-only. This happens because rbd_osd_req_format_write() sets the snapshot context based on obj_request->img_request. At this point, however, obj_request->img_request has not been set yet, to the snapshot context is set to NULL. Fix this by moving rbd_img_obj_request_add(), which sets obj_request->img_request, before the osd request formatting calls. This resolves: http://tracker.ceph.com/issues/5465Reported-by: NKarol Jurak <karol.jurak@gmail.com> Signed-off-by: NJosh Durgin <josh.durgin@inktank.com> Reviewed-by: NSage Weil <sage@inktank.com> Reviewed-by: NAlex Elder <elder@linaro.org>
-
- 26 6月, 2013 1 次提交
-
-
由 Josh Durgin 提交于
rbd_dev_v2_header_onetime() fetches striping information, and checks whether the image can be read by compariing the stripe unit to the object size. It determines the object size by shifting the object order, which is 0 at this point since it has not been read yet. Move the call to get the image size and object order before rbd_dev_v2_header_onetime() so it is set before use. Signed-off-by: NJosh Durgin <josh.durgin@inktank.com> Reviewed-by: NSage Weil <sage@inktank.com>
-
- 13 6月, 2013 1 次提交
-
-
由 Josh Durgin 提交于
Format 2 objects use 16 characters for the object name suffix to be able to express the full 64-bit range of object numbers. Format 1 images only use 12 characters for this. Using 12-character names for format 2 caused userspace and kernel rbd clients to read differently named objects, which made an image written by one client look empty to the other client. CC: stable@vger.kernel.org # 3.9+ Reported-by: NChris Dunlop <chris@onthe.net.au> Signed-off-by: NJosh Durgin <josh.durgin@inktank.com> Reviewed-by: NSage Weil <sage@inktank.com>
-
- 18 5月, 2013 5 次提交
-
-
由 Alex Elder 提交于
Bjorn Helgaas pointed out that a recent commit introduced a use-after-free condition in an error path for rbd_add(). He correctly stated: I think b536f69a "rbd: set up devices only for mapped images" introduced a use-after-free error in rbd_add(): ... If rbd_dev_device_setup() returns an error, we call rbd_dev_image_release(), which ultimately kfrees rbd_dev. Then we call rbd_dev_destroy(), which references fields in the already-freed rbd_dev struct before kfreeing it again. The simple fix is to return the error code after the call to rbd_dev_image_release(). Closer examination revealed that there's no need to clean up rbd_opts in that function, so fix that too. Update some other comments that have also become out of date. Reported-by: NBjorn Helgaas <bhelgaas@google.com> Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NJosh Durgin <josh.durgin@inktank.com>
-
由 Alex Elder 提交于
Whether rbd_client_create() successfully creates a new client or not, it takes responsibility for getting the ceph_opts structure it's passed destroyed. If successful, the structure becomes associated with the created client; if not, rbd_client_create() will destroy it. Previously, rbd_get_client() would call ceph_destroy_options() if rbd_get_client() failed, and that meant it got called twice. That led freeing various pointers more than once, which is never a good idea. This resolves: http://tracker.ceph.com/issues/4559 Cc: stable@vger.kernel.org # 3.8+ Reported-by: NDan van der Ster <dan@vanderster.com> Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NJosh Durgin <josh.durgin@inktank.com>
-
由 Jim Schutt 提交于
Ceph's encode_caps_cb() worked hard to not call __page_cache_alloc() while holding a lock, but it's spoiled because ceph_pagelist_addpage() always calls kmap(), which might sleep. Here's the result: [13439.295457] ceph: mds0 reconnect start [13439.300572] BUG: sleeping function called from invalid context at include/linux/highmem.h:58 [13439.309243] in_atomic(): 1, irqs_disabled(): 0, pid: 12059, name: kworker/1:1 . . . [13439.376225] Call Trace: [13439.378757] [<ffffffff81076f4c>] __might_sleep+0xfc/0x110 [13439.384353] [<ffffffffa03f4ce0>] ceph_pagelist_append+0x120/0x1b0 [libceph] [13439.391491] [<ffffffffa0448fe9>] ceph_encode_locks+0x89/0x190 [ceph] [13439.398035] [<ffffffff814ee849>] ? _raw_spin_lock+0x49/0x50 [13439.403775] [<ffffffff811cadf5>] ? lock_flocks+0x15/0x20 [13439.409277] [<ffffffffa045e2af>] encode_caps_cb+0x41f/0x4a0 [ceph] [13439.415622] [<ffffffff81196748>] ? igrab+0x28/0x70 [13439.420610] [<ffffffffa045e9f8>] ? iterate_session_caps+0xe8/0x250 [ceph] [13439.427584] [<ffffffffa045ea25>] iterate_session_caps+0x115/0x250 [ceph] [13439.434499] [<ffffffffa045de90>] ? set_request_path_attr+0x2d0/0x2d0 [ceph] [13439.441646] [<ffffffffa0462888>] send_mds_reconnect+0x238/0x450 [ceph] [13439.448363] [<ffffffffa0464542>] ? ceph_mdsmap_decode+0x5e2/0x770 [ceph] [13439.455250] [<ffffffffa0462e42>] check_new_map+0x352/0x500 [ceph] [13439.461534] [<ffffffffa04631ad>] ceph_mdsc_handle_map+0x1bd/0x260 [ceph] [13439.468432] [<ffffffff814ebc7e>] ? mutex_unlock+0xe/0x10 [13439.473934] [<ffffffffa043c612>] extra_mon_dispatch+0x22/0x30 [ceph] [13439.480464] [<ffffffffa03f6c2c>] dispatch+0xbc/0x110 [libceph] [13439.486492] [<ffffffffa03eec3d>] process_message+0x1ad/0x1d0 [libceph] [13439.493190] [<ffffffffa03f1498>] ? read_partial_message+0x3e8/0x520 [libceph] . . . [13439.587132] ceph: mds0 reconnect success [13490.720032] ceph: mds0 caps stale [13501.235257] ceph: mds0 recovery completed [13501.300419] ceph: mds0 caps renewed Fix it up by encoding locks into a buffer first, and when the number of encoded locks is stable, copy that into a ceph_pagelist. [elder@inktank.com: abbreviated the stack info a bit.] Cc: stable@vger.kernel.org # 3.4+ Signed-off-by: NJim Schutt <jaschut@sandia.gov> Reviewed-by: NAlex Elder <elder@inktank.com>
-
由 Jim Schutt 提交于
In his review, Alex Elder mentioned that he hadn't checked that num_fcntl_locks and num_flock_locks were properly decoded on the server side, from a le32 over-the-wire type to a cpu type. I checked, and AFAICS it is done; those interested can consult Locker::_do_cap_update() in src/mds/Locker.cc and src/include/encoding.h in the Ceph server code (git://github.com/ceph/ceph). I also checked the server side for flock_len decoding, and I believe that also happens correctly, by virtue of having been declared __le32 in struct ceph_mds_cap_reconnect, in src/include/ceph_fs.h. Cc: stable@vger.kernel.org # 3.4+ Signed-off-by: NJim Schutt <jaschut@sandia.gov> Reviewed-by: NAlex Elder <elder@inktank.com>
-
由 Alex Elder 提交于
An osd client has a red-black tree describing its osds, and occasionally we would get crashes due to one of these trees tree becoming corrupt somehow. The problem turned out to be that reset_changed_osds() was being called without protection of the osd client request mutex. That function would call __reset_osd() for any osd that had changed, and __reset_osd() would call __remove_osd() for any osd with no outstanding requests, and finally __remove_osd() would remove the corresponding entry from the red-black tree. Thus, the tree was getting modified without having any lock protection, and was vulnerable to problems due to concurrent updates. This appears to be the only osd tree updating path that has this problem. It can be fairly easily fixed by moving the call up a few lines, to just before the request mutex gets dropped in kick_requests(). This resolves: http://tracker.ceph.com/issues/5043 Cc: stable@vger.kernel.org # 3.4+ Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NSage Weil <sage@inktank.com>
-
- 14 5月, 2013 13 次提交
-
-
由 Alex Elder 提交于
Add code to rbd_img_obj_exists_callback() to detect when a clone's parent image has disappeared, and re-submit the original write request in that case. Kill off some redundant assertions. This completes the resolution for: http://tracker.ceph.com/issues/3763Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NJosh Durgin <josh.durgin@inktank.com>
-
由 Alex Elder 提交于
Add code to rbd_img_parent_read_full_callback() to detect when a clone's parent image has disappeared, and re-submit the original write request in that case. (See the previous commit for more reasoning about why this is appropriate.) Rename some variables in rbd_img_obj_parent_read_full_callback() to match the convention used in the previous patch. Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NJosh Durgin <josh.durgin@inktank.com>
-
由 Alex Elder 提交于
If a clone image gets flattened while a parent read request is underway, the original rbd object request needs to be resubmitted. The reason is that by the time we get the response to the parent read request, the data read from the parent may be out of date. In other words, we could see this sequence of events: rbd client parent image/osd ---------- ---------------- original object ENOENT; issue parent read respond to parent read child image flattened original image header refresh <--- original object written independently here parent read response received Add code to rbd_img_parent_read_callback() to detect when a clone's parent image has disappeared (as evidenced by its parent overlap becoming 0), and re-submit the original read request in that case. Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NJosh Durgin <josh.durgin@inktank.com>
-
由 Alex Elder 提交于
A format 2 clone image can be the subject of a "flatten" operation, during which all of its data gets "copied up" from its parent image, leaving the image fully populated. Once this is complete, the clone's association with the parent is abolished. Since this can occur when a clone is mapped, we need to detect when it has occurred and handle it accordingly. We know an image has been flattened when we know it at one time had a parent, but we have learned (via a "get_parent" object class method call) it no longer has one. There might be in-flight requests at the point we learn an image has been flattened, so we can't simply clean up parent data structures right away. Instead, we'll drop the initial parent reference when the parent has disappeared (rather than when the image gets destroyed), which will allow the last in-flight reference to clean things up when it's complete. We leverage the fact that a zero parent overlap renders an image effectively unlayered. We set the overlap to 0 at the point we detect the clone image has flattened, which allows the unlayered behavior to take effect immediately, while keeping other parent structures in place until in-flight requests to complete. This and the next few patches resolve: http://tracker.ceph.com/issues/3763Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NJosh Durgin <josh.durgin@inktank.com>
-
由 Alex Elder 提交于
Keep a reference count for uses of the parent information for an rbd device. An initial reference is set in rbd_img_request_create() if the target image has a parent (with non-zero overlap). Each image request for an image with a non-zero parent overlap gets another reference when it's created, and that reference is dropped when the request is destroyed. The initial reference is dropped when the image gets torn down. Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NJosh Durgin <josh.durgin@inktank.com>
-
由 Alex Elder 提交于
Define rbd_parent_request_create() and rbd_parent_request_destroy() to handle the creation of parent image requests submitted for layered image objects. For simplicity, let rbd_img_request_put() handle dropping the reference to any image request (parent or not), and call whichever destructor is appropriate on the last put. Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NJosh Durgin <josh.durgin@inktank.com>
-
由 Alex Elder 提交于
Define rbd_dev_unparent() to encapsulate cleaning up parent data structures from a layered rbd image. Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NJosh Durgin <josh.durgin@inktank.com>
-
由 Alex Elder 提交于
Previously when a layered write was going to involve a copyup request, the original osd request was released before submitting the parent full-object read. The osd request for the copyup would then be allocated in rbd_img_obj_parent_read_full_callback(). Shortly we will be handling the event of mapped layered images getting flattened, and when that occurs we need to resubmit the original request. We therefore don't want to release the osd request until we really konw we're going to replace it--in the callback function. Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NJosh Durgin <josh.durgin@inktank.com>
-
由 Alex Elder 提交于
Get parent info for format 2 images on every refresh (rather than just during the initial probe). This will be needed to detect the disappearance of the parent image in the event a mapped image becomes unlayered (i.e., flattened). Avoid leaking the previous parent spec on the second and subsequent times this information is requested by dropping the previous one (if any) before updating it. (Also, extract the pool id into a local variable before assigning it into the parent spec.) Switch to using a non-zero parent overlap value rather than the existence of a parent (a non-null parent_spec pointer) to determine whether to mark a request layered. It will soon be possible for a layered image to become unlayered while a request is in flight. This means that the layered flag for an image request indicates that there was a non-zero parent overlap at the time the image request was created. The parent overlap can change thereafter, which may lead to special handling at request submission or completion time. This and the next several patches are related to: http://tracker.ceph.com/issues/3763 NOTE: If an error occurs while refreshing the parent info (i.e., requesting it after initial probe), the old parent info will persist. This is not really correct, and is a scenario that needs to be addressed. For now we'll assert that the failure mode is unlikely, but the issue has been documented in tracker issue 5040. Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NJosh Durgin <josh.durgin@inktank.com>
-
由 Alex Elder 提交于
An rbd clone image that has an overlap with its parent of 0 is effectively not a layered image at all. Detect this case and treat such an image as non-layered. Issue a warning to be sure the user knows what's going on. This resolves: http://tracker.ceph.com/issues/5028Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NJosh Durgin <josh.durgin@inktank.com>
-
由 Alex Elder 提交于
Currently, rbd_img_obj_parent_read_full() assumes the incoming object request contains bio data. But if a layered image is part of a multi-layer stack of images it will result in read requests of page data to parent images. This is handling the same kind of issue as was resolved by this commit: 5b2ab72d rbd: support reading parent page data This resolves: http://tracker.ceph.com/issues/5027Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NJosh Durgin <josh.durgin@inktank.com>
-
由 Alex Elder 提交于
The code that reads object data from the parent for a copyup on write request currently assumes that the size of that request is the size of a "full" object from the original target image. That is not necessarily the case. The parent overlap could reduce the request size below that. To fix that assumption we need to record the number of pages in the copyup_pages array, for both an image request and an object request. Rename a local variable in rbd_img_obj_parent_read_full_callback() to reflect we're recording the length of the parent read request, not the size of the target object. This resolves: http://tracker.ceph.com/issues/5038Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NJosh Durgin <josh.durgin@inktank.com>
-
由 Alex Elder 提交于
The rbd code has a need to be able to restart an osd request that has already been started and completed once before. This currently wouldn't work right because the osd client code assumes an osd request will be started exactly once Certain fields in a request are never cleared and this leads to trouble if you try to reuse it. Specifically, the r_sent, r_got_reply, and r_completed fields are never cleared. The r_sent field records the osd incarnation at the time the request was sent to that osd. If that's non-zero, the message won't get re-mapped to a target osd properly, and won't be put on the unsafe requests list the first time it's sent as it should. The r_got_reply field is used in handle_reply() to ensure the reply to a request is processed only once. And the r_completed field is used for lingering requests to avoid calling the callback function every time the osd client re-sends the request on behalf of its initiator. Each osd request passes through ceph_osdc_start_request() when responsibility for the request is handed over to the osd client for completion. We can safely zero these three fields there each time a request gets started. One last related change--clear the r_linger flag when a request is no longer registered as a linger request. This resolves: http://tracker.ceph.com/issues/5026Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NJosh Durgin <josh.durgin@inktank.com>
-
- 09 5月, 2013 12 次提交
-
-
由 Alex Elder 提交于
Get rid of rbd_img_request_get(), because it isn't used, and maybe won't ever be needed. Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NJosh Durgin <josh.durgin@inktank.com>
-
由 Alex Elder 提交于
Any changes to parent images are immaterial to any mapped clone. So there is no need to have a watch event registered on header objects except for the header object of an image that is mapped. In fact, a watch request is a write operation, and we may only have read access to a parent image. We can't set up the watch request until we know the name of the header object though. So pass a flag to rbd_dev_image_probe() to indicate whether this probe is for a mapping or for a parent image. Change the second parameter to rbd_dev_header_watch_sync() be Boolean while we're at it. This resolves: http://tracker.ceph.com/issues/4941Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NJosh Durgin <josh.durgin@inktank.com>
-
由 Alex Elder 提交于
The rbd_dev->mapping field for a parent image is not meaningful. Since rbd_image_probe() is used both for images being mapped and their parents, it doesn't make sense to set that flag in that function. So move the setting of the mapping.read_only flag out of rbd_dev_image_probe() and into rbd_add() instead. This resolves: http://tracker.ceph.com/issues/4940Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NJosh Durgin <josh.durgin@inktank.com>
-
由 Alex Elder 提交于
Currently, rbd_img_parent_read() assumes the incoming object request contains bio data. But if a layered image is part of a multi-layer stack of images it will result in read requests of page data to parent images. Fortunately, it's not hard to add support for page data. This resolves: http://tracker.ceph.com/issues/4939Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NJosh Durgin <josh.durgin@inktank.com>
-
由 Alex Elder 提交于
In rbd_img_obj_parent_read_full_callback() there is an assertion intended to verify the size of the image request for a full parent read was the size of the original request's target object. But assertion was looking at the parent image order rather than the original one, and these values can differ. Fix that. This resolves: http://tracker.ceph.com/issues/4938Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NJosh Durgin <josh.durgin@inktank.com>
-
由 Alex Elder 提交于
This rearranges rbd_dev_v2_refresh() so it works more like rbd_dev_v1_header_info(). While format 1 images need to read the whole header object to get any information, format 2 can collect almost all information selectively. So the one-time initialization will remain in a separate function--based on rbd_dev_v2_probe(). Rename rbd_dev_v2_refresh() to be rbd_dev_v2_header_info(), and have it call rbd_dev_v2_header_onetime() if it's being called for the first time for the given rbd device. Rename rbd_dev_v2_probe() to be rbd_dev_v2_header_onetime() and remove the image size and snapshot context calls it held in common with the refresh function. Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NJosh Durgin <josh.durgin@inktank.com>
-
由 Alex Elder 提交于
Get rid of the trivial wrapper functions rbd_dev_v1_refresh() and rbd_dev_v1_probe(), substituting rbd_dev_v1_header_read() calls in their place. Rename rbd_dev_v1_header_read() to be rbd_dev_v1_header_info(), to be more generic (it will better reflect what happens with format 2 images). Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NJosh Durgin <josh.durgin@inktank.com>
-
由 Alex Elder 提交于
An rbd_dev structure's fields are all zero-filled for an initial probe, so there's no need to explicitly zero the parent_spec and parent_overlap fields in rbd_dev_v1_probe(). Removing these assignments makes rbd_dev_v1_probe() *almost* trivial. Move the dout() message that announces discovery of an image into rbd_dev_image_probe(), generalize to support images in either format and only show it if an image is fully discovered. This highlights that are some unnecessary cleanups in the error path for rbd_dev_v1_probe(), so they can be removed. Now rbd_dev_v1_probe() *is* a trivial wrapper function. Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NJosh Durgin <josh.durgin@inktank.com>
-
由 Alex Elder 提交于
Now that rbd_header_from_disk() only fills in one-time fields once, we can extend it slightly so it releases the other fields before replacing their values. This way there's no need to pass a temporary buffer and then copy all the results in. Just use the rbd device header structure in rbd_header_from_disk() so its values get updated directly. Note that this means we need to take the header semaphore at the point we update things. So pass the rbd_dev rather than the address of its header as its first argument to rbd_header_from_disk(), and have it return an error code. As a result, rbd_dev_v1_header_read() does all the work, rbd_read_header() becomes unnecessary, and rbd_dev_v1_refresh() becomes a very simple wrapper. Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NJosh Durgin <josh.durgin@inktank.com>
-
由 Alex Elder 提交于
This rearranges rbd_header_from_disk so that it: - allocates the snapshot context right away - keeps results in local variables, not changing the passed-in header until it's known we'll succeed - does initialization of set-once fields in a header only if they have not already been set The last point is moot at the moment, because rbd_read_header() (the only caller) always supplies a zero-filled header buffer. Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NJosh Durgin <josh.durgin@inktank.com>
-
由 Alex Elder 提交于
The passed-in header structure is zeroed in rbd_header_from_disk(). Instead, have the caller do it. Note that there are two callers, rbd_dev_v1_refresh() and rbd_dev_v1_probe(). The latter already has a zeroed header structure so zeroing it isn't necessary there. Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NJosh Durgin <josh.durgin@inktank.com>
-
由 Alex Elder 提交于
Defer setting the size and features fields of a mapped image until after the Linux disk structure is set up. Set the capacity of the disk after that. Rearrange the definition of rbd_image_header, separating the fields that are set only once from those that can be updated. Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NJosh Durgin <josh.durgin@inktank.com>
-
- 08 5月, 2013 7 次提交
-
-
由 Alex Elder 提交于
Hold off setting the read-only flag in rbd_add() for an image being mapped until we have successfully probed the image. At that point we know whether it's a snapshot mapping or not, so we can set the read-only flag in that one place rather than doing so (for snapshots) in rbd_dev_mapping_set(). To do this, pass a flag to the image probe routine indicating whether we want a read-only mapping. Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NJosh Durgin <josh.durgin@inktank.com>
-
由 Alex Elder 提交于
This function is a duplicate of rbd_dev_mapping_clear(), and was added by mistake. Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NJosh Durgin <josh.durgin@inktank.com>
-
由 Alex Elder 提交于
Currently rbd_dev_mapping_set() looks up the snapshot id for the snapshot whose name is found in the rbd device's spec structure. That function gets called by rbd_dev_device_setup(), which is called by rbd_add() *after* rbd_dev_image_probe(). If the image probe succeeds, the rbd device's spec will already have been updated to include names and ids for all fields. Therefore there's no need to look up the snapshot id in rbd_dev_mapping_set(). Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NJosh Durgin <josh.durgin@inktank.com>
-
由 Alex Elder 提交于
The presence of the LAYERING bit in an rbd image's feature mask does not guarantee the image actually has a parent image. Currently that bit is set only when a clone (i.e., image with a parent) is created, but it is (currently) not cleared if that clone gets flattened back into a "normal" image. A "parent_id" query will leave the parent_spec for the image being mapped a null pointer, but will not return an error. Currently, whenever an image with the LAYERED feature gets mapped, a warning about the use of layered images gets printed. But we don't want to do this for a flattened image, so print the warning only if we find there is a parent spec after the probe. Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NJosh Durgin <josh.durgin@inktank.com>
-
由 Alex Elder 提交于
Since rbd_update_mapping_size() is now a trivial wrapper, just open code it in its two callers. Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NJosh Durgin <josh.durgin@inktank.com>
-
由 Alex Elder 提交于
When a mapped image changes size, we change the capacity recorded for the Linux disk associated with it, in rbd_update_mapping_size(). That function is called in two places--the format 1 and format 2 refresh routines. There is no need to set the capacity while holding the header semaphore. Instead, do it in the common rbd_dev_refresh(), using the logic that's already there to initiate disk revalidation. Add handling in the request function, just in case a request that exceeds the capacity of the device comes in (perhaps one that was started before a refresh shrunk the device). Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NJosh Durgin <josh.durgin@inktank.com>
-
由 Alex Elder 提交于
This commit: d98df63e rbd: revalidate_disk upon rbd resize instituted a call to revalidate_disk() to notify interested parties that a mapped image has changed size. This works well, as long as the the rbd device doesn't map a snapshot. A snapshot will never change size. However, the base image the snapshot is associated with can, and it can do so while the snapshot is mapped. The problem is that the test for the size is looking at the size of the base image, not the size of the mapped snapshot. This patch corrects that. Update the warning message shown in the event of error, and move it into the callers. This resolves: http://tracker.ceph.com/issues/4911Signed-off-by: NAlex Elder <elder@inktank.com> Reviewed-by: NJosh Durgin <josh.durgin@inktank.com>
-